Microframe Corporation 3007 Series Guida Utente Scaricare il pdf (Pagina 64)

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Status Codes

6: The key number parameter is invalid

The value stored in the key number parameter is not valid for the file

being accessed. The key number must correspond to one of the keys

defined for the file. Valid key numbers are 0 through 118.

7: The key number has changed

The key number parameter changed before a Get Next, Get Next

Extended, Get Previous, or Get Previous Extended operation. The

operation requires the same key number parameter as the previous

operation, because the MicroKernel uses positioning information

relative to the previous key number.

In a related situation, the MicroKernel returns this status code when

an application performs a Delete or Update operation immediately

following a Get operation. If the application changes the value of the

key number in the Delete or Update operation (from the value used

with the preceding Get operation), the MicroKernel deletes or

updates the record as requested and does not return this status code,

at least not at this point. However, the MicroKernel does return this

status code on the very first Get Next, Get Next Extended, Get

Previous, or Get Previous Extended operation performed after the

deletion or update, even if that Get operation uses the same key value

the application passed to the Delete or Update operation.

If you need to change key numbers between consecutive Get Next,

Get Next Extended, Get Previous, or Get Previous Extended

operations (or in Delete or Update operations as described in the

preceding paragraph), use a Get Position operation followed by a Get

Direct/Record operation to reestablish positioning for the new index

path.

8: The current positioning is invalid

You must establish the current position in order to update or delete

a record. Perform a Get or Step operation to establish the current

position. The MicroKernel also returns this status code if the

application passed an invalid position block for the file.

9: The operation encountered the end-of-file

The MicroKernel returns this status code in the following situations:

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Microframe Corporation 3007 Series Guida Utente Pagina 64